Printing device



Mal 2l 1940- VF. s. RowE vPR:[N'IWT DEVICE Filed Nov. 30, 1938 lNVENTOR F. .5, kol/v5.

www

ATTORNEY Patented May 21,1940

Frederick Samuel Rowe, Bloomfield, N. J., as-

signor to Westinghouse Electric & Manufacturing Company, East Pittsburgh, Pa., a corporation of Pennsylvania Application November 30, 193B, Serial No. 243,113

9 Claims.

This invention relates to mechanism for printing or etching insignias on glass devices, such as lamp bulbs, and more particularly to an improved forin of stamp and stamp holder for that s purpose.

One of the principal objects of my invention, generally considered, is the provision of an improved stamp and holder for printing or etching lamp bulbs and similar glass devices.

l Another object of my invention is the provision of a more satisfactory method of holding the stamp used in etching or printing glass devices, such as incandescent electric lamps.

A further object of my invention is the provision of a holder for lamp etching or printing stamps, comprising a body having a threaded extension for connection with operating means, a backing member, a rubber pad, and a sleeve or cap threaded to the body member and having an inwardly extending peripheral flange for engaging the outer edge portion of the stamp proper and holding it in adjustable engagement with the pad and backing member, said backing member presenting a curvature to the pad approximately corresponding with that of the surface to be printed or etched, and the adjustment of the threaded sleeve allowing for variation in the curvature of the stamp proper in order to provide for accurate etching or printing of the lamp bulb or other article.

A still further object of my invention is the reduction in the cost of stamping facilities for printing or etching lamp bulbs, involving the provision of interchangeability between the stamp holders and stamps, and the elimination of cementing the stamp proper to the holder whereby one holder may serve for a large number of stamps.

lAn additional object of my invention is a holder for rubber stamps used for printing or etching lamp bulbs and similar devices, in which the stamp proper is protected from the action of the inking rollers by a peripheral flange portion on the sleeve which clamps it to the holder or actuating device.

Other objects and advantages of the invention,

relating to the particular arrangement and construction of the various parts, will become apparent as the description proceeds.

Referring to the drawing illustrating my invention:

Figure 1 is a fragmentary vertical sectional view showing a stamp embodying my invention and associated machinery at the point in the process where a monogram or other character M is being printed on the inside of a lamp bulb.

(Cl. 10b-379) Figure 2 is a similar view of the machinery shown in Figure 1, in a position where the lamp bulb has been removed, and the stamp is being re-inked preparatory to printing another bulb.

Figure 3 is a face or plan view of a form of stamp and its associated holder embodying my invention.

Figure 4 is a partial elevational and partial axial sectional view of the stamp and holder shown in Figure 3. 10

Figure 5 is a side or edge view of the stamp proper shown in Figure 4.

Figure 6 is a view corresponding to Figure 4 but showing a modification.

Referring to the drawing in detail, like parts be- 15 mg designated by like reference characters, and first considering the embodiment of my invention illustrated in Figures 3, 4, and 5, there is shown a rubber stamp proper II comprising a printing or stamping face I2 which, in the presi0 ent embodiment, is formed to print the characters Mazda 1000 L, 6.6 A, W, all enclosed in circles and arranged as a monogram. The portion I2 is on a thicker central body I3 from which extends a relatively thin peripheral flange I4. 25

The stamp holder I5 comprises a body or securing element I6 involving a threaded extension I'I, carrying a nut IB, and adapted to fit an actuating device which will be subsequently described.

'Ihe body portion I6 receives a backing ele- $0 ment I9 which, in the present embodiment, telescopes with ilange 2| on the body portion I5 and is held in place by means of a set screw 22. The outer surface of the backing member I9, in the present embodiment, is shown at 23 as spher- 35 ically convex, because it is particularly adapted for use with a holder I5 for printing on spherical- 1y concave surfaces.

Normally engaging the surface `23 of the backing member I9 is a resilient pad 24, desirably m formed of sponge rubber, on which rests the stamp proper I I, and all three members are held assembled with the body member I6 by the sleeve 25 threaded to said body member, as indicated at 26, and having an inwardly extending peripheral flange 21 which clamps over the iiange I4 of the stamp proper II, and h olds it, the pad 24, backing member I9 and body element I6 in assembled relation, exerting the proper amount of pressure on the pad 24 and stamp II, in order to bend 50 .the latter from a normally ilat condition to the desired convex shape for properly printing on a concave surface, such as the inner surface of the glass forming the lamp bulb 28, as shown in Figure 1, 56

. nut i8 or d8a,

yto

a similar stamp proper I I, except that `the printidentical with those shown in Figure 4, except that the sleeve 25a, which threadably engages `the corresponding body I6a as indicated at 26, has a correspondingly larger opening and smaller flange 21et for overlapping the ange I I of the stamp ll. All of the other parts may be identical, that is, the body member I6, threaded extension Ha, and nut I8, may be identical with the members I6 and l1 of the preceding embodiment.

The backing member lila and screw 22a may be identical with the members I9 and 22 of the preceding embodiment, and even the resilient element 24 may be identical with that designated as 24 in the preceding embodiment.

Reference to Figures 1 and 2 will show how a stamp embodying my invention may be used for etching or printing lamp bulbs, such as designated by the reference character 28. The stamp and holder are secured to an actuating member 29, as by screwing thereinto the threaded extension l? or il, as the case may be. The total length is so adjusted that, when the machinery is operated, a proper amount of pressure is applied on the inner surface of the bulb 28, held in a head kor other supporting device 3i. The

as the case may be, is then tightened against the actuating member 29 to hold the stamp in adjusted position.

Before the member 26 is operated to print or etch the bulb 28, the stamp ii is inked in any desired manner, as by means of an inking roller 32 on a movable arm 33 which carries said roller alternately to and from another roller 34 which transfers ink of the desired character thereto from a reservoir 35.k

Before the inked stamp is brought into en- 28, a backing member concave resilient pad 31, is brought down upon the outer surface of the bulb to hold itin place, while the stamp is moved from the position indicated in dotted lines to thatindicated in `full lines in Figure 1.

After the inked stamp has printed on the bulb, as illustrated in Figure 1, it is withdrawn to the dotted position, the bulb removed, the stamp raised and re-inked as illustrated in Figure 2 and the bulb etching or stamping operation may be repeated.

Although I have shown particular apparatus for etching or printing the inside surface of lamp bulbs, it will be understood l that with suitable changes, such as substituting a correspondingly changed backing member I9, said stamp may serve for etching or printing the outer surfaces of lamp bulbs in a manner such as disclosed in any one of the Fredenburgh Patent #1,645,045, the Higgins et al. Patent #1,647,625, and the May Patent #1,647,646, al1 owned by the assignee of the present application. One form of glass printing or etching ink is disclosed in the Fredenburgh Patent #1,538,890, also owned by the assignee of the present application.

From the foregoing disclosure, it will be seen that I have provided an improved stamp and holder for etching or printing glass articles, such as bulbs for incandescent electric or other lamps, as well as a more satisfactory means for holding holder shown in this'gure may be f my stamp as used withl such stamps in the manufacture of such devices,

avoiding the former practice of cementing curable without diiilculty.

Although preferred embodiments of vention have been disclosed, it will be stood that modifications may be made within th; siiirit and scope of the appended claims.

c a m:

l. A stamp device for printing comprising a holder,

pad.

in engagement with said pad.

4. A 'stamp for printing comprising aholder,

justable pressure.

hold it in engagement with said pad.

6. A stamp device for printing comprising a holder, a backing member one side of which engages said holder, a resilient pad engaging the other side of said backing member. a rubber Y member;

anonime` which is convex tocorrespond with the curvature of the lamp surfacefto be engaged by the stamp, a sponge rubber pad engaging said convex sur-- face, arubber stamp` engaging said pad, and a sleeve threaded .to said body and havingan in.

wardly projecting flange engaging an outer peri said stamp, to adjustediy hold pheral portion of it in position on said 4body 'and pull the stamp iri'.`

` to. `rfz'ompressing relationwith said pad and dis-f tort-'it andthe latter-td convex form by pressing` i, surfaceI of said backngi them-over the convexgagesxsaiihelder4 and-theotherof which is concave tocorrespondwiththecurvature of a convex surface-to be printed-,-a resilient pad engaging the other side of said: backingniember. a ruba backing member one side of which engages said body, and the other of l printing comprising holder-a backing membeigone side of which enu,

ber stamp engaging said pad.' and means adjustably secured tof. said holder for clamping said stamp in engagement with said pad tof'c'ause it to assume -a; desired". printing surface curvature.

9. Inflamp bulb printing or etching apparatus,

a stamp device comprising a holder'having a body with a threaded extension for connection with operating means, a backing member one side of which engages'said, body and the other of which is curved; to correspond with the curvature offthe lamp surface to be engaged bythe stamp proper, a set screw passing through 'said body and threadably engaging said backing member to hold-the latter seated in said body, a resilient pad. engaging'the eurvedsurface of said backing'm'ember, a

a; central body face and a relatively thin `peripheral flange extending therefrorm, and' a sleeve member threadably adjustable onsaid body and having an; in-

'\ wardly projecting flange engaging .the peripheral iiange of said stammte adjustably h old'git in po" sition" with lrespect to said '.pad and backling member, anddistort it to. a form' corresponding with "that of sind: lamp' surface.

i malanni-CK SAMUEL rubberstamp. engaging the' louter surfaceof said said stamp comprising;

portion formed with a stamping 

